I built my library "name" -> libname.a

QT -= gui
TARGET = name
TEMPLATE = lib
CONFIG += staticlib

(Also trying with dynamic -> libname.so ... )

This library contains a class

#include <...>
class NAMESHARED_EXPORT ClassName
{

public:
ClassName();
~ClassName();

QString getAttrVal( const int a,
const int b,
const char *data,
QString *description );

...
private:
...
};

NOW IN AN OTHER PROJECT I NEED TO CALL THE FUNCTIONS implemented in this library:

Eg.

.pro
LIBS += -Llib/ -lname

.h
class xxx
{
private:
ClassName *CN;
public:
xxx();
}

.cpp
xxx::xxx(){
CN = new ClassName();
QString test = CN->getAttrVal( 1, 2, "ciao", "bau" );
}


BUT WHEN COMPILE:

/xxx.h:188: error: ISO C++ forbids declaration of ‘ClassName’ with no type

Any suggestion?